Isiokwu a na-ekpuchi ngwa nke Teflon akwa-okpomọkụ ákwà (PTFE-ntekwasa fiberglass ákwà) na aerospace ubi. Mpaghara ngwa ngwa: nrụpụta ihe mejupụtara - ntọhapụ akwa / ihe nkiri na ịkpụzi autoclave, akwa dịpụrụ adịpụ, eriri ebu oke okpomọkụ maka mmepụta prepreg; Injin na nchekwa okpomọkụ dị elu - mkpuchi mkpuchi okpomọkụ, mkpuchi ọkụ ọkụ, njikọ okpomọkụ na-agbanwe agbanwe; Ihe mkpuchi eletriki na nchekwa waya - mkpuchi eriri na ngalaba injin na ọdụ ụgbọ ala; Ime ụgbọ elu na nchekwa ọkụ - ákwà mgbochi ọkụ / ihe mgbochi anwụrụ ọkụ na-ezute ụkpụrụ FST, mkpuchi mkpuchi okpomọkụ / ihe mkpuchi mkpuchi; Ngwa oghere na ikuku - mgbakọ multi-layer mkpuchi (MLI), mgbochi oyi-weld lubrication liners maka usoro ntinye akụkụ nke anyanwụ na eriri antenna, akwa njikwa ọkụ.

Isiokwu a na-akọwa otú PTFE mkpuchi agbụ na fiberglass ákwà mkpụrụ na Teflon elu-okpomọkụ ákwà. Njikọ kemịkalụ ozugbo agaghị ekwe omume n'ihi ike elu dị ala nke PTFE. A na-enweta njikọ site na: Mechanical interlocking (njikọ anụ ahụ) - PTFE emulsion na-abanye n'ime eriri eriri na eriri eriri mgbe ọ gachara; Silane njikọ ọnụ n'ụlọnga pretreatment - Nleta molekụla àkwà mmiri n'etiti inorganic iko emep uta eri na organic primer; Ntugharị oyi akwa kemịkalụ - iji PAI, PPS, PES ma ọ bụ PEEK resins na PTFE micropowder, etinyere ya mgbe ejikọtara ọgwụgwọ iji mepụta oyi akwa mgbanwe siri ike; Hot-agbaze nrapado film lamination - FEP ma ọ bụ PFA fim (na-agbaze ebe 260-310 Celsius) njikọ tupu kpụrụ PTFE fim na ákwà; Gradient Ọdịdị site multiple impregnation na sintering cycles - itughari akpa ngafe na ihe nkedo / njikọ njikọ banye miri n'ime emep uta eri, sochiri dị ọcha PTFE impregnations, na-eke compositional gradient si fiberglass ka dị ọcha PTFE.

Isiokwu a na-ekwu otú microporous Ọdịdị imewe nke breathable Teflon (PTFE) elu-okpomọkụ teepu itule ikuku permeability na mkpuchi na-abụghị osisi Njirimara. Esemokwu dị n'etiti: ikike ikuku chọrọ oghere oghere, ebe mkpuchi na-achọ njupụta na enweghị mkpisi na-achọ ebe dị larịị. Atụmatụ imewe dabara adaba: na-achịkwa nkezi pore dayameta (0.1-2μm, nke kachasị <0.5μm) iji gbochie mgbaze gbazee ma nọgide na-enwe voltaji ndakpọ; njikwa porosity na 50-70% (≈60% kacha mma) na-enweta Gurley 20-100s / 100cc na ike dielectric ≥2kV maka ihe nkiri 0.13mm; nabata usoro pore netwọkụ 3D dị elu tortuosity (τ≈2.5-4) iji gbochie ọwa mgbasa ozi kwụ ọtọ; wuo ihe owuwu asymmetric gradient pore nwere akwa akpụkpọ anụ dị n'elu (1-5μm) maka enweghị mkpisi / mkpuchi na ime ime oghere maka iku ume; tinye super-oleophobic/hydrophobic elu post-ọgwụgwọ na-enweghị pore blockage.

Isiokwu a na-enye usoro nhazi usoro maka igbochi nrapado nrapado na nrapado ọbara mgbe ị na-eji PTFE elu-okpomọkụ teepu iji chebe PCB gold mkpịsị aka n'oge SMT mgbakọ. Ntụle ihe kpatara mgbọrọgwụ: ihe fọdụrụ na-apụta site na nkwụsị ọnụ ma ọ bụ nnyefe interfacial; ọbara na-apụta site na viscosity dobe na nrapado jubigara ókè n'okpuru okpomọkụ nlọghachi azụ. Ngwọta isi bụ nhọrọ teepu kwesịrị ekwesị: silicone PSA nwere obere oge kacha elu ≥300C, na-aga n'ihu ≥260C, ngụkọta ọkpụrụkpụ 0.08-0.13mm na mkpa akwa-njikọ nrapado n'ígwé, na mgbochi-ọbara ọbara / ihe fọdụrụ-free asambodo. Usoro nhazi usoro isii: ihicha tupu lamination na IPA; lamination efu na-ebupụ ikuku zuru oke; Profaịlụ okpomọkụ reflow kachasị na-eji nwayọọ kpo oku (<2°C/s); oyi peeling n'okpuru 50 ° C na 180 ° n'akuku; nhazi ozugbo n'ime awa 24 na otu-eji naanị; njikwa ọdịda site na ihichapụ IPA na nyocha 40-50x magnifier. Maka PCB nwere akụkụ abụọ, jiri teepu ọhụrụ dochie tupu nhazi akụkụ nke abụọ.

Isiokwu a na-enye nduzi nhazi maka igbochi wrinkles na akwa akwa okpomọkụ PTFE n'oge sintering. Ihe na-akpata nhụsianya bụ n'ụzọ bụ isi site na mbelata okpomọkụ na-ezighi ezi na nrụgide na-ekwekọghị ekwekọ. Ngwọta na-ekpuchi usoro ọrụ zuru oke: njikwa mkpụrụ ihe akụrụngwa (ntọhapụ zuru oke / ikpo ọkụ iji kpochapụ nrụgide dị n'ime); impregnation na ihicha (ọtụtụ ihe mkpuchi dị mkpa, gradient dị nwayọọ okpomọkụ, ndị na-anya ụgbọala na-arụ ọrụ); njikwa ọkụ na-ekpo ọkụ (1-3% overfeed maka ikike nkwụsịtụ ọkụ, njikwa micro-tension na-emechi emechi, ịdị n'otu okpomọkụ dị n'ime ± 5 ° C, gradient preheating-sintering- cooling curve, air-flotation furnaces dị ka ezigbo ngwọta, curved spreader rollers); oyi na ntọala (nwayọọ nwayọọ nwayọọ nwayọọ, nọgide na-agbasa ruo n'okpuru 100 Celsius C, zuru jụụ tupu ikuku); nlekota oru n'ịntanetị site na nyocha ọkụ siri ike na nyocha infrared.

Isiokwu a na-ekpuchi ihe ndị chọrọ nju oyi n'oge akwa akwa okpomọkụ dị elu nke PTFE. Mgbe emechara ya na 380-400 Celsius, akwa ahụ ga-agafe ngwa ngwa site na mpaghara 310-315 Celsius C nke nwere mmetụta kristal. Ọnụego jụrụ oyi na-atụ aro bụ opekata mpe 30-50C / min (akwa akwa nwere ike nweta 100-200 Celsius C / min site na ntụ oyi ikuku). Ngwa ngwa jụrụ oyi (quenching) na-emepụta kristal dị ala (45-50%), na-enye nro dị nro, mkpuchi siri ike na elu dị larịị, nchikota siri ike, arụmọrụ na-adịghị mma nke ọma, na iguzogide delamination na cracking. Igwe oyi na-adị nwayọọ (ịjụ ọkụ ọkụ) na-ebute kristal dị elu (60-70%), na-eme ka mkpuchi siri ike, nke na-agbaji agbaji na-adaba na ntachi, peeling na microcracks.

Isiokwu a na-atụnyere ọnụ ụlọ-okpomọkụ na elu-okpomọkụ maturation nke silicone mgbali-sensive nrapado maka PTFE teepu. Okpomọkụ dị elu (120-180ºC) na-emepụta netwọk nwere njikọ chiri anya nwere ike ịdị n'otu siri ike, na-egbochi ihe fọdụrụ na nrapado mgbe ọ gachara. Ọ na-etolite agbụ kemịkalụ na PTFE substrates site na nhazi primer, na-ewepụ ihe egwu delamination. Okpomọkụ dị elu na-ewepụkwa ihe na-adịghị ala ala tupu nnyefe, na-egbochi mmetọ mmanụ na silicone n'oge okpomọkụ mbụ.

Ntuziaka a na-ekpuchi nhọrọ teepu okpomọkụ dị elu nke PTFE maka ịkpụzi injection na ngwa mgbochi osisi. Nhọrọ dabere na ọnọdụ okpomọkụ: ≤260 ° C maka plastik n'ozuzu (ọkọlọtọ silicone PSA teepu, 0.13-0.18mm); 260-300 ° C maka plastik injinia dị elu dị ka PC, PA66, POM (ihe mkpuchi silicone dị elu, 0.18-0.25mm); 300-400°C maka PEEK, LCP, PPS nso ndị na-agba ọsọ na-ekpo ọkụ (teepu nrapado ada ada; jiri akwa PTFE na-enweghị nrapado ma ọ bụ ihe nkiri PFA). Nhọrọ dabere na ihe onwunwe: ihe ndị na-adịghị mma chọrọ ntọhapụ elu PTFE dị ọcha; Ihe mejupụtara iko / mineral chọrọ nnukwu ọrụ 0.25mm + teepu na-eguzogide iyi; ihe mgbakwunye na-emebi emebi na-achọ nrapado na nnukwu mkpụrụ na-eguzogide ọgwụ; Ngwa static-sensitive chọrọ teepu PTFE ojii mgbochi static.

A na-eme akwa akwa akwa PTFE dị elu site na mkpuchi PTFE n'elu akwa fiberglass dị elu, na-enye ike ike, nkwụsị ọkụ, ihe ndị na-adịghị mma, nguzogide kemịkalụ, na obere esemokwu. Ngwa ndị dị mkpa gụnyere: mbufe ụlọ ọrụ (nkwakọ ngwaahịa na-ekpo ọkụ ọkụ, ịsa nri nri, igwe nkụ akwa, ihicha akwụkwọ / ihe nkiri); akwa ntọhapụ nke ihe mejupụtara na akwa akwa akwa akwa akwa na-ekpo ọkụ; ákwà mgbochi mgbochi ịgbado ọkụ na mkpuchi mkpuchi okpomọkụ; moto eletriki na mkpuchi mkpuchi; ụlọ na-agbagharị agbagharị na nkwado pipeline; kemịkalụ filtration na valvụ akara na gburugburu ndị na-emebi emebi. Ike tensile dị elu na-eme ka ịdịte aka n'okpuru mgbakasị ahụ, ndọkasị, mgbanwe ugboro ugboro, na nrụgide igwe dị elu n'ofe ngwa ndị a dị arọ dị iche iche.

N'oge sintering, PTFE ahụ na fiberglass ákwà agbaze n'elu 327°C, na-ebibi mbụ apịaji-chain lamellae na urughuru ókè na-etolite amorphous gbazee. Mgbe jụrụ oyi, PTFE recrystallizes n'ime spherulites nke mejupụtara radially gbakwasara lamellae, na crystallinity sitere na 50-70%. Ọnụego jụrụ oyi na-ekpebi izu oke kristal: ngwa ngwa jụrụ oyi na-eme ka kristal dị elu, spherulites buru ibu, ike siri ike; Nkwụsị ngwa ngwa na-enye spherulites dị mma yana ime mgbanwe dị mma.